Connecting coupling with a sliding sleeve and collet chucks

Abstract

In order to provide a connecting coupling whose structure has increased stability and which is used for transmitting gaseous and/or liquid fluids, especially for filling the petrol tank of vehicles, comprising a sliding sleeve ( 18 ) which is used to lock collet chucks ( 15 ) above a connecting nipple, a guide sleeve ( 38 ) with longitudinal grooves is provided between the sliding sleeve ( 18 ) and the collet chucks ( 15 ). The collet chucks are guided inside the longitudinal grooves.

1. A connection coupling for transferring fluids, the coupling having an inlet end, an outlet end, and a lumen therebetween, the coupling comprising:
 collet chucks, each collet chuck having an outer end; 
 a sliding sleeve for locking the collet chucks onto a connection nipple, the sliding sleeve at least partially surrounding the collet chucks; 
 a guide sleeve with longitudinal grooves in which the collet chucks are guided; 
 a spacer sleeve at least partially surrounding the collet chucks and the guide sleeve, at least a portion of the spacer sleeve being disposed between the sliding sleeve and the collet chucks such that the collet chucks do not directly contact the sliding sleeve; 
 a sealing piston disposed relative to the collet chucks so as to receive at least a portion of the connection nipple between the sealing piston and the collet chucks, the sealing piston forming at least a portion of the connection coupling lumen; and 
 an annular groove formed between a shoulder of the sliding sleeve and the spacer sleeve and arranged radially outside of the guide sleeve, the groove receiving at least portion of the outer ends of the collet chucks at least when the collet chucks are in an uncoupled position. 
 
     
     
       2. A connection coupling according to  claim 1 , wherein the collet chucks are inserted into the longitudinal grooves. 
     
     
       3. A connection coupling according to  claim 1 , wherein the guide sleeve comprises a centering incline at the outlet end of the connection coupling. 
     
     
       4. A connection coupling according to  claim 1 , wherein the guide sleeve is exchangeably fastened with at least one straight pin to a front housing part. 
     
     
       5. A connection coupling, according to  claim 1 , wherein a scraper ring is held radially within the collet chucks around the sealing piston. 
     
     
       6. A connection coupling according to  claim 1 , wherein three collet chucks and three longitudinal grooves are provided in a 120° division in the guide sleeve.